The highest day temperature in December 2025 was 60°F. The lowest night temperature was 14°F. The average values for day and night temperatures during December were 42.2°F и 31.8°F respectivly.

The average sea surface temperature in December 2025 for Fenwick Island was 44.1°F. The maximum and minimum values were 40.4°F and 51.4°F respectively.

Most of the days in December are sunny but you can also expect cloudy and gloomy days.

Precipitation total in December for Fenwick Island is 1.3 in. It makes december one of the most rainy months of the year.

The average wind speed in December is 10.7 mph.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Fenwick Island in December is 5.6 hours.